Trolley.



No. 798,673. PATBNTED SEPT. 5, 1905. R. G. GRISWOLD & G. G. WILLITS.

TROLLEY.

APPLICATION FILED 001213. 1903.

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UNITED STATES PATENT OFFICE.

ROBERT (i. GRISWVOLD AND CHARLES C. IVILLITS, OF QUINCY, MASSA- CHUSETTS, ASSIGNORS OF ONE-HALF TO J ERRY MORROW, OF W ELLS TON, OHIO.

TIROLLEY.

Specification of Letters Patent.

Patented Sept. 5, 1905.

To u/ZZ whom it may concern.-

Be it known that we, Roe ER'I G. GmswoLD and CuAuLns C. \VILLITS, of Quincy, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Trolleys, of which the following is a specification, reference being had to the accom pan ying drawings.

Our invention relates to an improvement in trolleys designed for use more especially in connection with electric railways using what is known as the overhead system, which employs a suspended circuit-wire and a trolley attached to a pole or arm mounted on a car, said trolley being held in contact with the wire by a yielding pressure produced by a suitable spring in the usual well-known manner.

It has for its object to provide a device to be attached to the upper end of a trolley pole or arm to take the place of devices now in general use which will automatically prevent the trolley-wheel from jumping or riding off the trolley-wire while the car is in motion and afford means for readily finding, guiding, and replacingthe trolley-wheel on the trolleywire when said wheel has been removed for the purpose of swinging the trolley pole around to reverse the same when it is desired to run the car in the opposite direction or for any other purpose.

The invention comprises, essentially, a bracket attached to the upper end of a trolleypole having one or more arms provided with teeth, a harp pivoted thereto supporting a trolley-wheel, an oscillatory tinder pivoted to said harp and provided with guide-arms, one or both provided with teeth at their inner ends which mesh with the teeth of the arm or arms, as the case may be, of the bracket, means for throwing said finder upward when the trolley-wheel leaves the wire, a clamp to fit over the trolley pole or arm just below the bracket designed to hold a spring, which by means of a link is attached to the pivoted harp, and in the several features and combination of features and details, as more fully hereinafter described and claimed.

In the drawings illustrating our invention, Figure 1 is a front View in elevation of our invention attached to the upper end of a trolley pole or arm; Fig. 2, a side elevation; Fig. 3, a front elevation showing the several parts in operative position to guide the trolleywheel onto the trolley-wire; Fig. at, a side elevation with the several parts in the position shown in Fig. 3. Figs. 5 and 6 are end and side elevations, respectively, of the clamp for holding the spring which operates the pivoted harp; Fig. 7, a central vertical section; and Fig. 8, a vertical cross-section of a modified form of trolley wherein the bracket is provided with two arms instead of one, each having teeth, and both of the arms of the oscillatory linder are provided with teeth which mesh with the teeth on the arms of said bracket.

In the drawings, in which like reference characters denote like parts throughout the several views, 1 represents the trolley pole or arm normally pressed upward by means of the usual spring at the base thereof. A substantially U-shaped bracket 2 is attached to the upper end of the pole or arm by means of rivets 3 or in any other suitable manner, and 1 is an arm extending from one side of said bracket having a curved toothed rack 2. A harp 4: is pivoted to the bracket 2 by means of a pin 5 and is provided with an arm 5, having a lug 5. A clamp 6 is secured to the pole l by means of screws or bolts 7, and a flat spring 8 is held by said clamp at one end, while the opposite end is secured to a link 9, which connects the end of the spring to the end of the pivoted harp.

11 is an oscillatory linder provided with diverging tapering guide-arms 11, extending from hubs 11', said hubs being pivoted to the pivoted harp by means of a pin 12 and said arms being connected together by means of a loop 11, which extends, preferably, at a right angle to said. arms.

11 represents a series of teeth arranged radially on the periphery of the hub of one of the arms 11., said teeth engaging the toothed rack 2 of the arm 1.

13 is a trolley-wheel mounted on the pin 12 between the arms 11 of the tinder designed to engage and travel on the trolley-wire l3, and 1a is the contact-spring for collecting the current from the trolley-wheel.

The movement of the pivoted harp & is limited in one direction by the lug 5, abutting against a stop 16 on the bracket 2 and in the opposite direction by said lug abutting against the arm 1 at the point 17. The tension of the spring 8 is so adjusted that the lug 5 of the harp i is held against the stop 16 when the trolley-wheel is not in contact or hearing against the trolley-wire.

21 is a rope attached to the ring of the clamp.

The pin 5 is secured in place by split pins 19 and the pin 12 by split pins 20.

The operation is as follows: When the trolley pole or'arm is in its normal position, as indicated in Fig. 2, the trolley-wheel is brought up against the trolley-wire 13, thus forcing the harp down against the arm 1 at the point 17. This motion causes the finder 11 to revolve to a horizontal position, as shown in Fig. 2. In this position the harp is below the plane of all guy-wires, switches, crossings, section-breaks, or troughs under overhead bridges. Thus the finder cannot come in contact with any of the above-mentioned objects, (see front elevation, Fig. 1;) but the instant the pole or arm is thrown downward by any means, so as to make the trolley-wheel ordinarily leave the wire, the spring tension, due to the spring 8, which is constantly acting on the harp 5, immediately throws said harp up until it bears against the stop 16 and stands in the position shown in Fig. 4. This action causes the finder to revolve about the pin 12 into a vertical position, as shown in Fig. 4, due to the meshing of the teeth on the hub of the finder and the teeth on the arm of the bracket 2. In this position, the front elevation of which is shown in Fig. 3, the finder straddles the trolley-wire, and when the spring at the base of the pole again overcomes the downward tendency given to the pole it forces the trolley-wheel upward, and the wheel is automatically guided astride the trolley-wire. As soon as the trolley-wheel properly bears against the trolley-wire the pressure forces the wheel and harp down, the harp abutting against the arm of the bracket at the point 17, which action causes the finder to return to its normal horizontal position, as shown in Fig. 2.

As any tendency of the trolley-wheel to leave the wire is practically anticipated by our automatic device, the guide-arms being immediately placed in position to guide the trolleywheel to the wire, the frequent occurrences of the trolley-wheel jumping the wire, which, as is well known, frequently occurs, are prevented and the consequent damage to the trolley is prevented. When it becomes necessary to remove the wheel from the wire for any We do not desire to be understood as limiting ourselves to the details of construction and arrangement as herein described and illustrated, as it is manifest that variations and modifications may-be made in thefea'tures of construction and arrangement in the adaptation of the device 'to various conditions of use without departing from the spirit of our invention and improvements. We therefore reserve the right to all such variations and modifications as properly fall within the scope of our invention and the terms of the following claims.

What we claim is 1. A trolley provided with a stationary toothed member rigidly secured thereto, a piv oted finder having teeth meshing with the teeth of said stationary toothed member, a harp carrying a trolley-wheel, and means for operating said harp and finder, substantially as described.

2. A trolley provided with an arm having teeth and designed to be attached to a trolleypole, a harp pivoted to said arm, a finder pivoted to said harp and provided with teeth which mesh with the teeth on said arm, and means for operating said trolley, substantially as described.

3. A trolley provided with a bracket having a stop, and an arm having teeth, a harp pivoted to said bracket provided with a lug designed to abut against saidstop, a finder pivoted to said harp provided with teeth which mesh with the teeth of the bracket, and means for operating said finder, substantially as described.

4. Atrolley provided with a bracket having an arm provided with a series of teeth, a harp pivoted to said bracket, means for operating and means for limiting the movement of said harp, and a finder pivoted to said harp provided with teeth meshing with the teeth on the arm of the bracket, substantially as described.

5. A trolley provided with a bracket having a series of teeth, a harp pivoted to said bracket, a finder pivoted to said harp provided with teeth which mesh with the teeth of the bracket, and a spring for operating said harp and finder, substantially as described.

6. Atrolley provided with a bracket having a series of teeth a harp pivoted to said bracket carrying a trolley-wheel, a finder pivoted to said harp and provided with teeth meshing with the teeth of the bracket, a spring for operating said harp, and a link connecting said .harp and spring, substantially as described.

7 A trolley provided with a substantially U-shaped bracket having an arm with a series of teeth, a harp having an arm pivoted in said bracket, means for limiting the movement of said harp, a finder pivoted to said harp provided with a series of teeth meshing with the teeth on the arm of the bracket, and a spring connected to the arm of the harp, substantially as described.

8. A trolley provided with a substantialLv U-shaped bracket having an arm provided with a series of teeth, a stop between the sides of said bracket, a harp provided with a depending arm pivoted to said bracket and having a lug at its lower extremity designed to abut against the stop of the bracket, a finder provided with arms pivoted to said harp, one of said arms provided with teeth which mesh with the teeth of the arm of the bracket, a link pivoted to the depending arm of said harp, and a spring connected to said link, substantially as described.

9. A trolley provided with a pole or arm having a clamp, a spring secured therein, a bracket attached to said pole or arm provided with a stop and an arm having a series of teeth, a harp pivoted to said bracket having a lug designed to abut against the stop on the bracket, a trolley-wheel, a link connecting the said spring with the arm of the harp, a finder provided with arms pivoted to said harp having teeth meshing with the teeth of the arm of the bracket, and a loop connecting said arms of the finder, substantially as described.

10. A trolley provided with a bracket having an arm with a series of teeth, a harp pivoted to said bracket the sides of which embrace said arm, a finder provided with arms pivoted to said harp one of said arms provided with teeth which mesh with the teeth on the arm of the bracket, and means connected to the harp for operating the finder, substantially as described.

11. A trolley provided with a toothed member, a harp pivoted thereto carrying a trolleywheel, a pivoted finder having teeth meshing with said toothed member, and means foroperating said harp and finder, substantially as described.

12. A trolley provided with a bracket having a series of teeth, a harp provided with a depending arm pivoted to and extending between the sides of said bracket, a finder provided with a series of teeth meshing with the teeth of the bracket, and means for operating said harp and finder, substantially as described.

13. A trolley provided with a stationary toothed member, a finder having teeth meshing with said toothed member, a pivoted harp carrying a trolley-wheel, and means for operating said harp and finder, substantially as described.

14. A trolley provided with a stationary toothed member, a harp pivoted on said toothed member and provided with a trolleywheel, a finder pivoted on said harp having teeth meshing with the teeth of the toothed member, and a loop embracing said trolleywheel, and means for operating said harp and finder, substantially as described.

15. A trolley provided with a stationary toothed member, a harp pivoted on said toothed member and provided with a trolleywheel, a finder pivoted on said harp having teeth meshing with the teeth of said toothed member and a loop embracing the trolleywheel, a link pivoted to said harp, a spring connected to said link, and a clamp designed to secure said spring to a trolley-pole, substantially as described.

16. A trolley provided with a stationary member rigidly secured thereto, a pivoted finder geared to said stationary member, a harp provided with a contact-making device, and means for operating said trolley, substantiall y as described.

17. A trolley provided with a stationary member, a pivoted finder geared directly thereto, a harp connected to said stationary member and provided with a device for making contact with a trolley-wire, substantially as described.

18. A trolley provided with a stationary member rigidly secured thereto, a finder geared directly to said stationary member, and a harp pivoted to said stationary memher and provided with a contact-making device, substantially as described.

19. The combination with a trolley-pole, of a spring-pressed harp pivotally carried by the pole, a trolley-wheel carried by the harp, a guide including a pair of arms pivotally carried by the harp, and meshed segments carried by the trolley pole and guide, substantially as described.

In testimony whereof we have al'lixed our signatures in presence of two witnesses.

ROBERT G. GRIS\VOLD. CHARLES C. \VILLITS. l/Vitnesses:

G. P. FROIIIINGIIAM, E. B. HILL. 

